asp.net mongo db 'System.TimeoutException: A timeout occurred after 30000ms' in docker com-CodePudding

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somebody tell me how to forward 27017 to 27018 or 27019 without getting this error I'm getting this error in every container that is not 27017

CodePudding user response：

Regarding ports, there are many reasons you are getting error.

1- your app's error log shows you are trying to connect to the wrong port, "27015".

2- your overriding compose file is ending with an extra "r", thus" default "docker compose up" does not read it unless you use "-f" flag

3- if containers use the same docker network, then they will see each other running at port "27017" with their internal docker IPs, not your host forwarded ports "27018/27019". see, they are still not "27015".

PS: the solution you provided above works but you have to remember every single port change you made and edit your files all the time if you change again. that is not feasible. you need to have a "production" and "development" environment files to run your app where you set ports once and they would just work.

CodePudding user response：

add this line to your docker-compose under your DB ports

command: ["mongod", "--port", "YourFavoritePort"]

for example

catalogdb: container_name: catalogdb restart: always volumes: - mongo_data:/data/db ports: - "YourFavoritePort:27017" command: ["mongod", "--port", "YourFavoritePort"]

for example, my favorite port is 27020

catalogdb: container_name: catalogdb restart: always volumes: - mongo_data:/data/db ports: - "27020:27017" command: ["mongod", "--port", "27020"]